The first declared National Monument in the United States.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The celebrated eyesore created by starry-eyed sweethearts.

Scotland's only funicular railway is also the United Kingdom's highest.

Largest lake in Great Britain measured by surface area.

The oldest floral clock in the world still functions today.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

A rare memorial paying homage to an altruistic woman from the 19th-century.

Once home to a Scottish baronet, this 18th-century historic house doubles as a legendary art space.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

A 18th century graveyard and its astonishing cortege of macabre iconography.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

A never-finished memorial to the heroes of the Napoleonic War has become "Scotland's Folly."

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

For better or worse, this whimsical sculpture garden was a favorite place of Rupert Murdoch's.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

The highway's southernmost spot is a beloved local attraction.

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

A massive skeleton suspended in the Memorial University of Newfoundland's Core Science Facility.

The first transatlantic wireless signal was received at this 17th-century fort.

A controversial blue hoop has been puzzling freeway drivers since 2013.